Add the staggered ring appear animation!

Bug: 197636896
Test: a lot of unlocking
Change-Id: I9a713ac12eae5128d409166110cece0b86d89ae4

1 files changed, 34 insertions, 14 deletions

diff --git a/src/com/android/launcher3/anim/Interpolators.java b/src/com/android/launcher3/anim/Interpolators.java
index 9c12abdf4e..3fe1082e29 100644
--- a/src/com/android/launcher3/anim/Interpolators.java
+++ b/src/com/android/launcher3/anim/Interpolators.java
@@ -47,6 +47,13 @@ public class Interpolators {
     public static final Interpolator DEACCEL_2_5 = new DecelerateInterpolator(2.5f);
     public static final Interpolator DEACCEL_3 = new DecelerateInterpolator(3f);
 
+    /**
+     * The decelerating emphasized interpolator. Used for hero / emphasized movement of content that
+     * is appearing e.g. when coming from off screen
+     */
+    public static final Interpolator EMPHASIZED_DECELERATE = new PathInterpolator(
+            0.05f, 0.7f, 0.1f, 1f);
+
     public static final Interpolator ACCEL_DEACCEL = new AccelerateDecelerateInterpolator();
 
     public static final Interpolator FAST_OUT_SLOW_IN = new PathInterpolator(0.4f, 0f, 0.2f, 1f);
@@ -162,8 +169,9 @@ public class Interpolators {
     }
 
     /**
-     * Runs the given interpolator such that the entire progress is set between the given bounds.
-     * That is, we set the interpolation to 0 until lowerBound and reach 1 by upperBound.
+     * Returns a function that runs the given interpolator such that the entire progress is set
+     * between the given bounds. That is, we set the interpolation to 0 until lowerBound and reach
+     * 1 by upperBound.
      */
     public static Interpolator clampToProgress(Interpolator interpolator, float lowerBound,
             float upperBound) {
@@ -172,18 +180,30 @@ public class Interpolators {
                     String.format("upperBound (%f) must be greater than lowerBound (%f)",
                             upperBound, lowerBound));
         }
-        return t -> {
-            if (t == lowerBound && t == upperBound) {
-                return t == 0f ? 0 : 1;
-            }
-            if (t < lowerBound) {
-                return 0;
-            }
-            if (t > upperBound) {
-                return 1;
-            }
-            return interpolator.getInterpolation((t - lowerBound) / (upperBound - lowerBound));
-        };
+        return t -> clampToProgress(t, lowerBound, upperBound);
+    }
+
+    /**
+     * Returns the progress value's progress between the lower and upper bounds. That is, the
+     * progress will be 0f from 0f to lowerBound, and reach 1f by upperBound.
+     */
+    public static float clampToProgress(float progress, float lowerBound, float upperBound) {
+        if (upperBound < lowerBound) {
+            throw new IllegalArgumentException(
+                    String.format("upperBound (%f) must be greater than lowerBound (%f)",
+                            upperBound, lowerBound));
+        }
+
+        if (progress == lowerBound && progress == upperBound) {
+            return progress == 0f ? 0 : 1;
+        }
+        if (progress < lowerBound) {
+            return 0;
+        }
+        if (progress > upperBound) {
+            return 1;
+        }
+        return (progress - lowerBound) / (upperBound - lowerBound);
     }
 
     /**